We know that cadmium is a toxic metal element, in nature, pay attention to the existence of sulfur cadmium ore, its difficult degradation, low toxicity, high stability, and accumulability, resulting in the constant increase of cadmium in water, which will cause great harm to the human body. In this chapter, Modi-Tech comes to learn with you, what do you need to do to reduce the harm caused by cadmium in the water environment?
The Harm of Cadmium in Water Environment!
Cadmium is widely used in industry, for example: for cadmium as an alloy soil can be matched into a lot of alloys, such as high tensile strength and wear resistance of hard copper alloy, which contains cadmium accounted for 0.5% ~ 1.0%; Cadmium nickel alloy is the bearing material of aircraft engines, and the famous Wood fusible alloy accounted for 12.5% cadmium. Due to the large thermal neutron capture cross section of cadmium, alloys containing silver indium cadmium can be used as control rods for atomic reactors. Cadmium compounds have been widely used in the manufacture of (yellow) pigments, plastic stabilizers, (television image tube) phosphors, insecticides, fungicides, paints, etc. Cadmium is also used in electroplating and rechargeable batteries.
Cadmium compounds are highly toxic, and the synergistic effect of cadmium and other elements can increase their toxicity. Cadmium is absorbed by the body through respiration, which can play the role of metal estrogen in the human body and stimulate the respiratory tract. Long-term exposure will cause anosmia, gum macula or gradual yellow circle, accumulate in the liver or kidney and cause harm, especially the kidney damage is more obvious, and can also lead to osteoporosis and softening of bones. At present, it is generally believed that the serious problems are connective tissue damage, reproductive system dysfunction, kidney damage, teratogenesis and carcinogenesis, which lead to human breast cancer. Cadmium is highly toxic, and the air and food polluted by cadmium are seriously harmful to human body.
It can be seen that once drinking water with excessive cadmium or sewage with excessive cadmium is discharged, it will bring serious consequences!
In Order to Reduce the Harm Caused By Cadmium, The Detection of Cadmium in Water is Necessary!
There are many methods to detect cadmium in water, including acid oxidation method and dithizone colorimetric determination of T8000-Cd total cadmium online analyzer produced by Modi-Tech. The pre-treated water sample is injected into the digestion reaction tank by the injection pump. The water sample first reacts with the acidic oxidant to oxidize all forms of cadmium in the water sample into divalent cadmium, and then the pH of the solution is adjusted to make it reach strong alkali, and then the characteristic color developing agent is added for extraction color developing reaction. In the measuring range, the degree of color change of the aqueous solution is proportional to the concentration of cadmium in the water sample, and the content of cadmium in the water sample can be calculated by measuring the color change. The detection limit of cadmium in water online analyzer is greatly reduced through the on-line extraction technology section, so that the cadmium in water online analyzer becomes a real-time continuous monitoring instrument for cadmium solubility in water in various industries.
